M66.86

M66.86: Spontaneous rupture of other tendons, lower leg

Non-billable headerICD-10-CM

M66.86 is a non-billable header ICD-10-CM code for spontaneous rupture of other tendons, lower leg. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 inherited from the categories above M66.86

Not part of this code, but both may be coded when both are present.

Written on M66: Spontaneous rupture of synovium and tendon

rotator cuff syndrome (M75.1-)
rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M66.86

3 child codes. Green means billable.

M66.861Spontaneous rupture of other tendons, right lower leg
M66.862Spontaneous rupture of other tendons, left lower leg
M66.869Spontaneous rupture of other tendons, unspecified lower leg

Other codes under M66.8

M66.80Spontaneous rupture of other tendons, unspecified site
M66.81Spontaneous rupture of other tendons, shoulder
M66.82Spontaneous rupture of other tendons, upper arm
M66.83Spontaneous rupture of other tendons, forearm
M66.84Spontaneous rupture of other tendons, hand
M66.85Spontaneous rupture of other tendons, thigh
M66.87Spontaneous rupture of other tendons, ankle and foot
M66.88Spontaneous rupture of other tendons, other sites
M66.89Spontaneous rupture of other tendons, multiple sites